Detections
Analytics
CVE-2026-80636
medium
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: revert ct extension genid infrastructure This infrastructure is not used anymore after moving ct timeout and helper to use datapath refcount to track object use. Revert commit c56716c69ce1 ("netfilter: extensions: introduce extension genid count") this patch disables all ct extensions (leading to NULL) for unconfirmed conntracks, when this is only targeted at ct helper and ct timeout. There is also codebase that dereferences the ct extension without checking for NULL which could lead to crash.
References
https://git.kernel.org/stable/c/d53eecbca16f056abba274075cb15120ab062518
https://git.kernel.org/stable/c/a052a94bcc629acaecc2ce42a4af77f8fa399757
https://git.kernel.org/stable/c/6bba4846f196d081bf553391d12b5a73dcc48685
https://git.kernel.org/stable/c/61eab1d0237eb513fe73e391a5926ee70092c325
https://git.kernel.org/stable/c/35e21a4dccc5c255ba59ccfbfeb4629ed21da972